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Date: Mon, 06 May 2024 15:34:45 +0200
From: Michael Walle <mwalle@...nel.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Sam Ravnborg <sam@...nborg.org>, Vinay Simha BN <simhavcs@...il.com>,
Tony Lindgren <tony@...mide.com>
Cc: Daniel Semkowicz <dse@...umatec.com>, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, Michael Walle <mwalle@...nel.org>
Subject: [PATCH 16/20] drm/bridge: tc358775: use proper defines to
configure LVDS timings
Provide bitfield macros for the individual fields in the LVDS timing
registers and get rid of the magic values.
Signed-off-by: Michael Walle <mwalle@...nel.org>
---
drivers/gpu/drm/bridge/tc358775.c | 52 +++++++++++++++++++++++++--------------
1 file changed, 33 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
index 33a97ddba7b5..c50554ec4b28 100644
--- a/drivers/gpu/drm/bridge/tc358775.c
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -111,11 +111,19 @@
#define VPCTRL_OPXLFMT BIT(8)
#define VPCTRL_EVTMODE BIT(5) /* Video event mode enable, tc35876x only */
#define HTIM1 0x0454 /* Horizontal Timing Control 1 */
+#define HTIM1_HPW GENMASK(8, 0)
+#define HTIM1_HBPR GENMASK(24, 16)
#define HTIM2 0x0458 /* Horizontal Timing Control 2 */
+#define HTIM2_HACT GENMASK(10, 0)
+#define HTIM2_HFPR GENMASK(24, 16)
#define VTIM1 0x045C /* Vertical Timing Control 1 */
+#define VTIM1_VPW GENMASK(7, 0)
+#define VTIM1_VBPR GENMASK(23, 16)
#define VTIM2 0x0460 /* Vertical Timing Control 2 */
+#define VTIM2_VACT GENMASK(10, 0)
+#define VTIM2_VFPR GENMASK(23, 16)
#define VFUEN 0x0464 /* Video Frame Timing Update Enable */
-#define VFUEN_EN BIT(0) /* Upload Enable */
+#define VFUEN_VFUEN BIT(0) /* Upload Enable */
/* Mux Input Select for LVDS LINK Input */
#define LV_MX0003 0x0480 /* Bit 0 to 3 */
@@ -346,24 +354,19 @@ static void tc358775_configure_dsi(struct tc_data *tc, unsigned int pixelclk)
static void tc358775_configure_lvds_timings(struct tc_data *tc,
struct drm_display_mode *mode)
{
- u32 hback_porch, hsync_len, hfront_porch, hactive, htime1, htime2;
- u32 vback_porch, vsync_len, vfront_porch, vactive, vtime1, vtime2;
+ u32 hback_porch, hsync_len, hfront_porch, hactive;
+ u32 vback_porch, vsync_len, vfront_porch, vactive;
+ unsigned int val;
hback_porch = mode->htotal - mode->hsync_end;
hsync_len = mode->hsync_end - mode->hsync_start;
+ hactive = mode->hdisplay;
+ hfront_porch = mode->hsync_start - mode->hdisplay;
+
vback_porch = mode->vtotal - mode->vsync_end;
vsync_len = mode->vsync_end - mode->vsync_start;
-
- htime1 = (hback_porch << 16) + hsync_len;
- vtime1 = (vback_porch << 16) + vsync_len;
-
- hfront_porch = mode->hsync_start - mode->hdisplay;
- hactive = mode->hdisplay;
- vfront_porch = mode->vsync_start - mode->vdisplay;
vactive = mode->vdisplay;
-
- htime2 = (hfront_porch << 16) + hactive;
- vtime2 = (vfront_porch << 16) + vactive;
+ vfront_porch = mode->vsync_start - mode->vdisplay;
/* Video event mode vs pulse mode bit, does not exist for tc358775 */
if (tc->type == TC358765)
@@ -379,12 +382,23 @@ static void tc358775_configure_lvds_timings(struct tc_data *tc,
regmap_update_bits(tc->regmap, VPCTRL, val,
VPCTRL_OPXLFMT | VPCTRL_MSF | VPCTRL_EVTMODE);
- regmap_write(tc->regmap, HTIM1, htime1);
- regmap_write(tc->regmap, VTIM1, vtime1);
- regmap_write(tc->regmap, HTIM2, htime2);
- regmap_write(tc->regmap, VTIM2, vtime2);
+ val = u32_encode_bits(hsync_len, HTIM1_HPW);
+ val |= u32_encode_bits(hback_porch, HTIM1_HBPR);
+ regmap_write(tc->regmap, HTIM1, val);
+
+ val = u32_encode_bits(hactive, HTIM2_HACT);
+ val |= u32_encode_bits(hfront_porch, HTIM2_HFPR);
+ regmap_write(tc->regmap, HTIM2, val);
+
+ val = u32_encode_bits(vsync_len, VTIM1_VPW);
+ val |= u32_encode_bits(vback_porch, VTIM1_VBPR);
+ regmap_write(tc->regmap, VTIM1, val);
+
+ val = u32_encode_bits(vactive, VTIM2_VACT);
+ val |= u32_encode_bits(vfront_porch, VTIM2_VFPR);
+ regmap_write(tc->regmap, VTIM2, val);
- regmap_write(tc->regmap, VFUEN, VFUEN_EN);
+ regmap_write(tc->regmap, VFUEN, VFUEN_VFUEN);
}
static const struct tc358775_pll_settings tc358775_pll_settings[] = {
@@ -475,7 +489,7 @@ static void tc358775_bridge_enable(struct drm_bridge *bridge)
tc358775_configure_lvds_timings(tc, mode);
tc358775_configure_pll(tc, mode->crtc_clock);
tc358775_configure_color_mapping(tc, connector->display_info.bus_formats[0]);
- regmap_write(tc->regmap, VFUEN, VFUEN_EN);
+ regmap_write(tc->regmap, VFUEN, VFUEN_VFUEN);
tc358775_configure_lvds_clock(tc);
/* Finally, enable the LVDS transmitter */
--
2.39.2
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